# Cd–Ti phases

> Cd–Ti system: 6 phases (tier A 4, tier C 1, liquid 1); 5 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references.

HTML: https://data.orchid-project.org/phases/pages/CD-TI.html · Markdown: https://data.orchid-project.org/phases/pages/CD-TI.md

6 phases (tier A 4, tier C 1, liquid 1); 5 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: [interactive registry](https://orchid-project.org/phases/?q=CD-TI) · [full JSON](https://data.orchid-project.org/phases/systems/CD-TI.json) · [Cd–Ti system page](https://data.orchid-project.org/systems/CD-TI.html) · [Markdown](https://data.orchid-project.org/phases/pages/CD-TI.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Cd–Ti system (6)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [BCC_A2](#phase-cd-ti-bcc-a2); _phase:cd-ti:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1057.26–2499.73 K, x(Ti) 0.71918–1 | 0 | 1 |
| [CDTI_B11](#phase-cd-ti-cdti-b11); _phase:cd-ti:cdti-b11_ | CuTi-gamma · B11 · tP4 · P4/nmm (129) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–893.1 K, x(Ti) 0.5–0.5 | 0 | 1 |
| [CDTI2](#phase-cd-ti-cdti2); _phase:cd-ti:cdti2_ | CuZr2 · tI6 · I4/mmm (139) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1101.02 K, x(Ti) 0.66667–0.66667 | 0 | 1 |
| [FCC_A1](#phase-cd-ti-fcc-a1); _phase:cd-ti:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 |
| [HCP_A3](#phase-cd-ti-hcp-a3); _phase:cd-ti:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1155.1 K, x(Ti) 0–1 | 0 | 1 |
| [LIQUID](#phase-cd-ti-liquid); _phase:cd-ti:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 594.29–2500 K, x(Ti) 0–1 | 4 | 1 |

## BCC_A2 (Cd–Ti)

- Id: `phase:cd-ti:bcc-a2`; status `assigned`
- Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 1057.26–2499.73 K, x(Ti) 0.71918–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cd-ti:bcc-a2)

Names (2): _corpus: _corpus:phase:cd-ti:bcc-a2  
_tdb: _tdb:CdTi-13Zha.tdb:BCC_A2  


### TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

[CdTi-13Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/CdTi-13Zha.tdb): BCC_A2, type code %B, sha256 `37d26de435e6ba5d…`

~~~~text
31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : CD TI% : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2013.06.005](https://doi.org/10.1016/j.calphad.2013.06.005) Cong Zhang, Kaiming Cheng, Weiwei Wang, Xi Li, Biao Hu, Shuhong Liu et al., Thermodynamic assessment of the Cd–X (X= Sr, Ti, B, V) systems, Calphad 42, 6-12 (2013).  
_assessment that models this phase_

## CDTI_B11 (Cd–Ti)

- Id: `phase:cd-ti:cdti-b11`; status `assigned`
- Structure: CuTi-gamma · B11 · tP4 · P4/nmm (129); type `st:b11-cuti-gamma-tp4`; tier A: standard phase name; confidence high
- Stoichiometry: Cd 0.5000, Ti 0.5000
- Stability: stable in 1 of 1 calculated diagram(s): 300–893.1 K, x(Ti) 0.5–0.5
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cd-ti:cdti-b11)

Names (2): _corpus: _corpus:phase:cd-ti:cdti-b11  
_tdb: _tdb:CdTi-13Zha.tdb:CDTI_B11  


### TDB models of CDTI_B11 (1): PHASE and CONSTITUENT statements as written

[CdTi-13Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/CdTi-13Zha.tdb): CDTI_B11, type code %, sha256 `37d26de435e6ba5d…`

~~~~text
41: PHASE CDTI_B11 % 2 1 1 !
42: CONST CDTI_B11 : CD : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2013.06.005](https://doi.org/10.1016/j.calphad.2013.06.005) Cong Zhang, Kaiming Cheng, Weiwei Wang, Xi Li, Biao Hu, Shuhong Liu et al., Thermodynamic assessment of the Cd–X (X= Sr, Ti, B, V) systems, Calphad 42, 6-12 (2013).  
_assessment that models this phase_

## CDTI2 (Cd–Ti)

- Id: `phase:cd-ti:cdti2`; status `assigned`
- Structure: CuZr2 · tI6 · I4/mmm (139); type `st:cuzr2-ti6`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (dft_space_group_139_matches_5_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Cd 0.3333, Ti 0.6667
- Stability: stable in 1 of 1 calculated diagram(s): 300–1101.02 K, x(Ti) 0.66667–0.66667
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cd-ti:cdti2)

Names (2): _corpus: _corpus:phase:cd-ti:cdti2  
_tdb: _tdb:CdTi-13Zha.tdb:CDTI2  


### TDB models of CDTI2 (1): PHASE and CONSTITUENT statements as written

[CdTi-13Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/CdTi-13Zha.tdb): CDTI2, type code %, sha256 `37d26de435e6ba5d…`

~~~~text
46: PHASE CDTI2 % 2 1 2 !
47: CONST CDTI2 : CD : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2013.06.005](https://doi.org/10.1016/j.calphad.2013.06.005) Cong Zhang, Kaiming Cheng, Weiwei Wang, Xi Li, Biao Hu, Shuhong Liu et al., Thermodynamic assessment of the Cd–X (X= Sr, Ti, B, V) systems, Calphad 42, 6-12 (2013).  
_assessment that models this phase_

## FCC_A1 (Cd–Ti)

- Id: `phase:cd-ti:fcc-a1`; status `assigned`
- Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high
- Stability: not stable in 1 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cd-ti:fcc-a1)

Names (2): _corpus: _corpus:phase:cd-ti:fcc-a1  
_tdb: _tdb:CdTi-13Zha.tdb:FCC_A1  


### TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

[CdTi-13Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/CdTi-13Zha.tdb): FCC_A1, type code %A, sha256 `37d26de435e6ba5d…`

~~~~text
26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : CD TI : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2013.06.005](https://doi.org/10.1016/j.calphad.2013.06.005) Cong Zhang, Kaiming Cheng, Weiwei Wang, Xi Li, Biao Hu, Shuhong Liu et al., Thermodynamic assessment of the Cd–X (X= Sr, Ti, B, V) systems, Calphad 42, 6-12 (2013).  
_assessment that models this phase_

## HCP_A3 (Cd–Ti)

- Id: `phase:cd-ti:hcp-a3`; status `assigned`
- Structure: Mg · A3 · hP2 · P6_3/mmc (194); type `st:a3-mg-hp2`; tier A: standard phase name; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 300–1155.1 K, x(Ti) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cd-ti:hcp-a3)

Names (2): _corpus: _corpus:phase:cd-ti:hcp-a3  
_tdb: _tdb:CdTi-13Zha.tdb:HCP_A3  


### TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

[CdTi-13Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/CdTi-13Zha.tdb): HCP_A3, type code %A, sha256 `37d26de435e6ba5d…`

~~~~text
36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : CD% TI% : VA : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2013.06.005](https://doi.org/10.1016/j.calphad.2013.06.005) Cong Zhang, Kaiming Cheng, Weiwei Wang, Xi Li, Biao Hu, Shuhong Liu et al., Thermodynamic assessment of the Cd–X (X= Sr, Ti, B, V) systems, Calphad 42, 6-12 (2013).  
_assessment that models this phase_

## LIQUID (Cd–Ti)

- Id: `phase:cd-ti:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 594.29–2500 K, x(Ti) 0–1
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cd-ti:liquid)

Names (3): _corpus: _corpus:phase:cd-ti:liquid  
_paper: _paper:10.1016/j.calphad.2013.06.005:Liquid  
_tdb: _tdb:CdTi-13Zha.tdb:LIQUID  


### TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written

[CdTi-13Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/CdTi-13Zha.tdb): LIQUID, type code %, sha256 `37d26de435e6ba5d…`

~~~~text
21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : CD TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2013.06.005](https://doi.org/10.1016/j.calphad.2013.06.005) Cong Zhang, Kaiming Cheng, Weiwei Wang, Xi Li, Biao Hu, Shuhong Liu et al., Thermodynamic assessment of the Cd–X (X= Sr, Ti, B, V) systems, Calphad 42, 6-12 (2013).  
_assessment that models this phase; reports values for this phase_

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735970
- R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065

Also cite B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work).

Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

```bibtex
@misc{orchid_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).